Games like The Last Leviathan

"Medieval Engineers" is a sandbox game set in the medieval era, focused on realistic engineering principles. Players can build various structures, such as castles and siege machines, using a variety of materials. The game also features a physics-based destruction system, allowing for realistic deconstruction and demolition of creations.

"NavalArt is a strategy game that allows for both single-player and multiplayer modes, including PvP. The game is a sandbox experience that involves ship design, construction, physics, and combat. As a player, you will construct your own warships using various parts and tools provided, and guide your fleet through different eras."

"Besiege" is a physics-based medieval siege warfare simulation game. Construct and control trebuchets, ballistas, and other war machines to destroy fortresses, conquer kingdoms, and complete various objectives. With a range of materials and design options, players can build and test their engineering skills in this creative and destructive sandbox.

TerraTech is an open-world sandbox adventure where you design and build vehicles from various blocks to explore, scavenge, and battle across diverse environments. Featuring co-op and PvP multiplayer modes, stunning graphics, and a captivating soundtrack, it offers both creative freedom and intense combat challenges. Despite some bugs and grinding, its humor and replayability make for a fun, engaging experience.

"Kinetic Void" is a sandbox-style space simulation game that allows players to build and customize their own spaceships while exploring the universe. The game features a dynamic economy, interactive ship components, and multiple factions to interact with. Players can engage in combat, trade, or diplomacy as they navigate the open world of "Kinetic Void".

Stonehearth is a sandbox simulation game where players lead a group of settlers to build a bustling town. They must manage resources, assign jobs, and defend against enemies, while making strategic decisions for the town's development. With a variety of customization options, players can create unique structures and craft items to shape their own medieval kingdom.

Scrap Mechanic is a multiplayer survival sandbox game that lets you build and create using powerful tools. Crash-landed on a strange planet, you must defend against hostile Farmbots and engineer your own adventures. Regular updates bring new content and optimizations to this imaginative, robot-filled world.

"Starship EVO is a work-in-progress space sim that offers a creative building experience, allowing players to build and customize starships, space stations, and handheld weapons using a variety of tools and options. The game currently features engaging space battles and plans to add a survival mode in the future. A Server/Client framework is used for multiplayer, which requires port forwarding." less than 400 characters, more than 100 characters.

Planet Explorers is an open-world sandbox adventure game set on a distant planet. Players can build and customize their own tools, vehicles, and structures, while also gathering resources, completing missions, and fighting alien creatures. The game features a dynamic story generation system, allowing for a unique experience with each playthrough.

StarMade is a free-to-play Sci-Fi Shooter game, currently in Alpha, that offers single-player, local multi-player, and online co-op/PvP gameplay. Players can support the developers by purchasing the game, which will grant access to future updates and exclusive features such as blueprint hosting and multiple skin uploads. Despite some optimization issues and bugs, the game offers plenty of humor and grinding for space exploration and battles.